TY  - RPRT
TI  - Hydrogen maser frequency standards for the Deep Space Network
AU  - Dachel, P. R.
AU  - Petty, S. M.
AU  - Meyer, R. F.
AU  - Sydnor, R. L.
PY  - 1977
UR  - https://ntrs.nasa.gov/citations/19770024251
ID  - 19770024251
ER  -